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The energy of sigma(2s), is greater than...

The energy of `sigma_(2s)`, is greater than that of `sigma_(1s)^**` orbital because

A

`sigma ` 2s orbitals is bigger than ` sigma ` 1s orbital

B

`sigma ` 2s is a bonding orbital whereas ` sigma ` 1s is an
antibonding orbital

C

`sigma 2s ` orbital has a greater value of n then ` sigma^(**)` 1s orbital

D

` sigma ` 2s orbitals is formed only after ` sigma ` 1s

Text Solution

Verified by Experts

The correct Answer is:
c
The energy increases as the value of principle quantum number (n) increases.
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sigma_(sp^2 - s) bond is present in

Comprehension given below is followed by some multiple choice question, Each question has one correct options. Choose the correct option. Molecular orbitals are formed by the overlap of atomic orbitals. Two atomic orbitals combine to form two molecular orbitals called bonding molecular orbital (BMO) and anti-bonding molecular orbital (ABMO). Energy of anti-bonding orbital is raised above the parent atomic orbitals that have combined and hte energy of the bonding orbital is lowered than the parent atomic orbitals. energies of various molecular orbitals for elements hydrogen to nitrogen increase in the order sigma1s lt sigma^(star)1s lt sigma^(star)2s lt ((pi2p_(x))=(pi2p_(y))) lt sigma2p_(z) lt (pi^(star)2p_(x) = pi^(star)2p_(y)) lt sigma^(star)2p_(z) and For oxygen and fluorine order of enregy of molecules orbitals is given below. sigma1s lt sigma^(star)1s lt sigma2s lt sigma^(star)2s lt sigmap_(z) lt (pi2p_(x) ~~ pi2p_(y)) lt (pi^(star)2p_(x)~~ pi^(star)2py) lt sigma^(star)2p_(z) Different atomic orbitalsof one atom combine with those atoms orbitals of the second atom which have comparable energies and proper orientation. Further, if the overlapping is head on, the molecular orbital is called sigma, sigma andif the overlap is lateral, the molecular orbital is called pi, pi . The molecular orbitals are filled with electrons according to the same rules as followed for filling of atomic orbitals. However, the order for filling is not the same for all molecules or their ions. Bond order is one of the most important parameters to compare the strength of bonds. 67) Which of the following pair is expected to have the same bonod order?

MARVEL PUBLICATION-NATURE OF CHEMICAL BOND -TEST YOUR GRASP
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  2. Which of the following does not follow the octet rule ? .

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  3. The stability of ionic crystal depends principally on

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  4. Which of the following statements about LiC and NaCl is wrong?

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  5. Which of the following bonds is the strongest ? .

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  6. Which of the following is the correct electron-dot structure of N2O mo...

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  7. Which of the following molecule has highest dipole moment?

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  8. Which of the following molecule has highest dipole moment?

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  9. The correct order of decreasing polarity is

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  10. In an ionic compound A^(+) X^(-) the degree of covalent bonding is gre...

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  11. According to Fazan rule, the covalent bond is favoured by :

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  12. Out of CHCl(3), CH(4) and SF(4) the molecules do not having regular ge...

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  13. Which out of the following structures is expected to have three bond p...

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  14. A molecule XY(2) contains two sigma bonds two pi bond and one lone pai...

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  15. N atom in NH(4)^(+) involves the hybridizations

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  16. A hybrid orbital formed from s and p-orbital can contribute to

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  17. The state of hybridization of the central atom is not the same as in t...

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  18. The d-orbitals involved in dsp^2 hybridisation is

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  19. Which of the following molecules in planar ?

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  20. The number of sp^2-s sigma bonds in benzene are

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  21. The bond angle in H2O is nearly 105^@ whereas bond angle in H2 S is ne...

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